﻿
Partial Class TabControl
    Inherits System.Web.UI.Page

    Protected Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click, Button2.Click, Button3.Click, Button4.Click
        Dim btn As Button = DirectCast(sender, Button)
        btn.Text = "submitted"
        btn.Enabled = False
    End Sub
End Class
